40012002123 has 16 divisors (see below), whose sum is σ = 53938029600. Its totient is φ = 26381859584.

The previous prime is 40012002083. The next prime is 40012002139. The reversal of 40012002123 is 32120021004.

40012002123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40012002123 - 2⁹ = 40012001611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40012002193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87936 + ... + 296237.

It is an arithmetic number, because the mean of its divisors is an integer number (3371126850).

Almost surely, 2^40012002123 is an apocalyptic number.

40012002123 is a deficient number, since it is larger than the sum of its proper divisors (13926027477).

40012002123 is a wasteful number, since it uses less digits than its factorization.

40012002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384558.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 40012002123 its reverse (32120021004), we get a palindrome (72132023127).

The spelling of 40012002123 in words is "forty billion, twelve million, two thousand, one hundred twenty-three".